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Finding the Fourth Proportional to 419.20, 628.37 and 273.04

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Solution

The fourth proportional to 419.20, 628.37 and 273.04 is: 409.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.20 : 628.37 = 273.04 : x
  2. Step 2: Convert to fraction form
    419.20/628.37 = 273.04/x
  3. Step 3: Cross multiply
    419.20x = 628.37 × 273.04
  4. Step 4: Simplify right side
    419.20x = 171,568.78
  5. Step 5: Solve for x
    x = 171,568.78/419.20
  6. Step 6: Final answer
    x = 409.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.